目的

Based on this model the optimum first planting density of Larix kaempferiLamb.

利用模型提出了以生产纸浆材、小径材为目的的豫西日本落叶松人工林的最适初植密度是 2 0 0 0～ 2 5 0 0株·hm-2 ，以生产中径材为目的是 110 0～ 15 0 0株·hm-2 。

OBJECTIVE: This study longitudinally described rates of posttraumatic stress disorder in two groups with different levels of severity of exposure to an earthquake in North China .

目的：此研究的目的是纵向描述两组不同程度暴露于中国北方地震中的受害者创伤后应激障碍的发病率。

A pair of primers producing 614bp amplification fragment were designed based on the sequence of the C\|polyhedrin gene of Bombyx mori CPV,and the expected amplification products were obatined when genomic dsRNAs isolated from purified BmCPV,DsCPV and Lymantria dispar CPV were used as templates.Genomic dsRNAs isolated from Heliothis armigera CPV and DNAs from Lymantria dispar nuclear polyhedrosis virus and DNAs from midgut tissue of healthy Dendrolimus spectabilis larva did not yield any amplification products.The detection limit of purified DsCPV genomic dsRNAs was 1.0pg.

依据家蚕质型多角体病毒质型多角体蛋白的核苷酸序列设计一对引物，从纯化的DsCPV\，BmCPV和舞毒蛾质型多角体病毒的基因组dsRNA可成功地扩增出长614bp的目的片段，从提取的健康松毛虫幼虫肠组织的DNA、舞毒蛾核型多角体病毒基因组核酸、以及棉铃虫质型多角体病毒基因组核酸，未能扩增出目的片段。

The results showed that the optimized content of Mg~(2+) was 5mmol/L; dNTP was 200μmol/L; Primer was 0.5μmol/L; Taq polymerase was lU/50ul in the PCR system. Only one fragment of about 270bp was amplified within the genome of 12 wild species and 23 cultivars of Mallus Mill., which indicated that Ty1-copia-like retrotransposons were archaic components of apple genome. The nested insertion of near and within the reverse transcriptase gene of Ty1-copia-like retrotransposons wasn\'t found in apple genome.2 The reverse transcriptase conservative region of Ty1-copia-like retrotransposons were amplified from Gala apple using the optimized PCR system. The amplification product was isolated, cloned and sequenced. Forty-five clones containing reverse transcriptase conservative region were obtained (accession number: AY849580 -AY849592 and DQ105035-DQ105066). Cluster analysis of these sequences showed a great heterogeneity among RT domains isolated from the same genotype.

从苹果属12个野生种和苹果23个栽培品种中都扩增到了约270bp的目的产物，且所有试材的扩增结果一致，均无目的条带以外的产物扩增，说明Ty1-copia类逆转座子在苹果属植物中广泛存在，且存在历史可能较为久远；从扩增结果看不出该逆转座子的逆转录酶基因或附近区域在苹果基因组内有嵌套行为的发生。2、利用优化了的PCR方法从嘎拉苹果基因组克隆了45条Ty1-copia类逆转座子逆转录酶保守序列(登陆号分别为AY849580-AY849592和DQ105035-DQ105066)，结果表明，同一基因组来源的这些序列存在高度的异质性。

Objective To analyze the CT and MRI manifestations of oral carcinoma,and to evaluate the value of imaging technologies in the diagnosis of oral carcinoma,thus to explore the most reasonable imaging method Methods 46 cases with oral carcinoma,proved by surgery and pathology （2 lip tumors,8 carcinomas of the gingival ridge,5 carcinomas of the buccal mucosa,24 tongue carcinomas,5 carcinomas of the floor of the mouth,2 tumors of the hard palate）,were analysed retrospectively32 cases were examined with CT and 14 cases with MRIImaging presentations were compared with surgery and pathology Results Of the 46 cases with oral carcinoma,22 were ulcerative lesion of infiltrative growth,24 were masslike lesion of extruded trowthOf the 32 cases examined with CT scan,27 were detected,5 were missed,the 4 missed cases were confirmed to be superficial ulcers by surgery and pathologyOf the 10 cases with bone destruction examined with CT scan,8 were manifested,2 were missedAnd of the 14 cases with MRI scan,all 14 were detected Conclusion CT and MRI scan are valuable for diagnosis of oral carcinomasThey can manifest the morphology and size of primary tumor,contiguous structures,bone invasion and cervical lymph node metastasisMRI is the optimal imaging method for superficial ulcerative lesion of infiltratibe growth

中华硕博网核心提示：徐锋，罗德红，唐威，欧阳汉，周纯武关键词：口腔肿瘤目的分析口腔癌的CT及MRI表现，评价影像检查在口腔癌诊断中的应用价值，探徐锋，罗德红，唐威，欧阳汉，周纯武目的分析口腔癌的CT及MRI表现，评价影像检查在口腔癌诊断中的应用价值，探索合理的影像学检查方法。方法回顾性分析经手术及病理证实的口腔癌46例（唇癌2例，牙龈癌8例，颊黏膜癌5例，舌癌24例，口底癌5例，硬腭癌2例），其中32例行CT扫描，14例行MRI扫描，将影像表现与手术所见及病理结果进行对照分析。结果46例口腔癌中，呈浸润性生长的溃疡型病变22例，外生性生长的肿物型病变24例。CT扫描32例，明确显示病变27例，遗漏病变5例，其中4例为表浅溃疡型病变。CT扫描病例中，10例有骨质侵犯，CT扫描准确评价8例，遗漏2例。MRI扫描14例，均准确评价肿瘤及其与四周结构的关系。结论 CT、MRI对口腔癌原发肿瘤的形态、大小、四周结构侵犯、颈部淋巴结转移的评价有重要价值。对于较小及呈浸润性生长的表浅溃疡型肿瘤，CT扫描尤其是CT平扫难以准确显示，应首选MRI。

PURPOSE: The purpose of the study was to test the hypothesis that estrogen and progesterone regulate gene expression in the meibomian gland.

目的：本试验的目的是验证雌孕激素能调控睑板腺中的基因表达这一假说。

PURPOSE: The purpose of the study was to test the hypothesis that estrogen and progesterone regulate gene expression in the meibomian gland.

摘要翻译：目的：本试验的目的是验证雌孕激素能调控睑板腺中的基因表达这一假说。

Abstract］ objective to discuss ultrasound diagnosis on fetal abnormal.methods we examined 1 231 example pregnant women carried on the prenatal with ultrasonography and the color ultrasonography.results picked out the fetal abnormal 9 examples,in which anencephaly were 2 examples,the hydrocephalus 3 examples,the meningocele 1 example,the endocardial cushion defects 1 example,the ectopiacordis accompanied grastroschisis 1 example,the cleftlip 1 example.all patients were confirmed through induced labor.conclusion fetal abnormal ultrasonography image is typical,the careful inspection correct analysis can discover promptly,ultrasonography is the first method to inspect the fetalabnormal,may achieve the prompt discovery,prompt termination of pregnancy item.

目的 探讨超声检查对胎儿畸形的诊断价值。方法对1231例孕妇进行产前超声检查。结果检出胎儿畸形9例，其中无脑畸形2例，脑积水3例，脑膜膨出1例，心内膜垫缺损1例，心脏外翻并腹壁大缺损1例，唇裂1例。所有患者均经引产后证实。结论胎儿畸形的声像图比较典型，细心检查正确分析能及时发现，超声是检查胎儿畸形的首选方法，可达到及时发现及时终止妊娠的目的。

In view of the characteristics of low permeability and difficulty to define the minable and unminable of coal in China,the concept of gas mixture enhanced coalbed met...

针对我国煤层渗透率普遍较低，不开采煤层与要开采煤层难以界定的特点，提出了着眼于低渗透要开采煤层，以提高煤层气产气流量为直接目的，以防治瓦斯灾害为最终目的的混合气体驱替煤层气的概念。

Purpose:The paper narrated the awareness condition of AIDS and other notifiable sexually transmitted diseases from the Keelung junior high school students.

目的：本研究目的在了解基隆市国中学生对於爱滋病和其他法定性传染病的认识状况并探讨其相关因素。

Recall that, in the Kolmogorov axiomatization, measurable sets are the sets which have a probability or, in other words, the sets corresponding to yes/no questions that have a probabilistic answer.

延期开工的Kolmogorov宣布要衡量所有套职能有限许多坐标限制在于衡量子寅。换句话说，如果是/否的问题回答f可看的价值观念在许多最有限坐标，然后它有一个概率的答案。

The experimental results showed that the algorithm can filter singular points and remain fixity of the target edge.

实验表明：基于模糊理论的图像智能滤波方法比常规图像滤波方法运算量小，它既能去除奇异点，又能保持图像中目标的边缘不变性，具有很好的滤波效果。